Finding the Fourth Proportional to 2,061.76, 2,845.76 and 1,399.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,061.76 : 2,845.76 = 1,399.72 : x
2. Step 2: Convert to fraction form
   2,061.76/2,845.76 = 1,399.72/x
3. Step 3: Cross multiply
   2,061.76x = 2,845.76 × 1,399.72
4. Step 4: Simplify right side
   2,061.76x = 3,983,267.19
5. Step 5: Solve for x
   x = 3,983,267.19/2,061.76
6. Step 6: Final answer
   x = 1,931.97